class RandomNumbers: 
    def __init__(self, a, b): 
        self.a = a 
        self.b = b

    def __add__(self, other):
        if not isinstance(other, RandomNumbers):
            return NotImplemented

        return RandomNumbers(other.a + self.a, other.b + self.b)

    def __mul__(self, other): 
        if not isinstance(other, int): 
            return NotImplemented 

        return RandomNumbers(self.a * other, self.b * other)

    def __repr__(self):
        return f"{self.__class__.__qualname__}({self.a}, {self.b})"

set_a = RandomNumbers(2, 4)